PPT-Chapter 6 Concurrency: Deadlock and Starvation

BYU CS 345 Concurrency 2 CS 345 Stallings Chapter Project 1 Computer System Overview 2 Operating System Overview 4 P1 Shell 3 Process Description and Control 4 Threads 4 P2 Tasking. deadlock Starvation threads wait indefinitely eg because some other thread is using a resource Deadlock circular waiting for resources Deadlock starvation but not the other way A Graph Theoretic Model of Deadlock The resource allocation graph RAG B Concurrency: Deadlock and Starvation. Operating Systems:. Internals and Design Principles, 6/E. William Stallings. Patricia Roy. Manatee Community College, Venice, FL. ©2008, Prentice Hall. Dining Philosophers Problem. What is it?. What is concurrency?. Concurrency is not a new idea…. Concurrency was first developed by the ancient Babylonians.. They thought about stuff, walked, and chewed gum … all at the same time.. Concurrency: Deadlock and Starvation. Operating Systems:. Internals and Design Principles, 6/E. William Stallings. Patricia Roy. Manatee Community College, Venice, FL. ©2008, Prentice Hall. Deadlock. Concurrency: Deadlock and Starvation. Operating Systems:. Internals and Design Principles. Seventh Edition. By William Stallings. Operating Systems:. Internals and Design Principles. When two trains approach each other at a crossing, both shall come to a full stop and neither shall start up again until the other has gone. Statute passed by the Kansas State Legislature, early in the 20th century.. Distributed Process Management. Patricia Roy. Manatee Community College, Venice, FL. ©2008, Prentice Hall. Operating Systems:. Internals and Design Principles, 6/E. William Stallings. Process Migration. Chapter 6. 2. Outline. Principles of Deadlock. Introduction and conditions for deadlock. Deadlock prevention. Deadlock Avoidance. Deadlock detection. An Integrated deadlock strategy. Concurrency Mechanisms in UNIX, Linux, Solaris and Windows. Alex Shpiner. Joint work with . Isaac Keslassy. Faculty of Electrical Engineering. ,. Technion. , Haifa, Israel. 2. The Problem. Temporary . starvation. . of . long. TCP flows. . in . datacenter. networks. 1. 7.1 System Model. A system consists of a set of resources. The resources can be grouped into types. Processes compete to have (unique) access to instances of the types. 2. Examples of resource types:. Ben Shelton. Motivation. Concurrent programming is . necessary. Multicore . revolution. Concurrent programming is . difficult, and . p. rogrammers need tools to help them write more reliable concurrent programs. Motivation, Challenges, Impact on Software Development. CSE 110 – Winter 2016. About These Slides. Due to the nature of this material, this lecture was delivered via the chalkboard. Every was advised that slides would not be available and that notes should be taken. . Database Concurrency Control. 1 Purpose of Concurrency Control. To enforce Isolation (through mutual exclusion) among conflicting transactions. . To preserve database consistency through consistency preserving execution of transactions.. Motivation, Challenges, Impact on Software Development. CSE 110 – Winter 2016. About These Slides. Due to the nature of this material, this lecture was delivered via the chalkboard. Every was advised that slides would not be available and that notes should be taken. . Operating Systems:. Internals and Design Principles. © 2017 Pearson Education, Inc., Hoboken, NJ. All rights reserved. . Ninth Edition. By William Stallings. Deadlock. The . permanent. blocking of a set of processes that either compete for system resources or communicate with each other.